there are plenty of
battery choices out there. while i've heard good things about the 15min cells, there are more choices. i prefer energizer's as they have proven to be of good quality over the last few months of use in mini-z's. i do not care for rayovaks (gold label). most of these can be found in target or walmart and even in some best buy's. i've noticed walmart typically has the cheapest prices. if you run you xmod alot, atleast 2 sets of batteries is a good idea. i must have about 5 sets by now and i still run out during all day mini-z and overland racing spree's.